Schneider Electric AS-B882-239 Programmable Logic Controller Module

Schneider Electric’s AS-B882-239 is a two‑channel Modicon high‑speed counter module for the 984/800‑series PLCs, designed to count encoder pulses with two independent counters that operate largely detached from the PLC scan. Each counter accepts 0–32 V DC input signals and can count up to 9,999, with the two counters cascaded to reach 99,999,999 counts, and supports pulse rates up to 30 kHz in high‑frequency mode (and about 350 Hz in low‑frequency mode). The module includes six auxiliary inputs and six outputs and provides a continuous output current rating of up to 0.5 A per output, with 1.5 A allowable per group, enabling fast, localized triggering for high‑speed applications. Used with Modicon 984 systems, the AS-B882-239 reports its current counts to the PLC on each scan, while its own outputs can switch independently to respond to count events without delaying the main control loop. Note that this part is listed as discontinued by Schneider Electric, reflecting its status in modern catalogs.